I have a six year old Dal. She is getting more spots. I thought they only got their spots when they were puppies.These new spots are very small. Is this normal?

The first "proper" spots come through from about 10 days till 6 weeks-ish. They get a second flush of (disappointing!) flecks from about 4-6 months, and can get a few more till they're adult. That's usually when it stops - it's very strange for more to be coming through at 6 years! :)